diff --git a/php-sebastian-diff3.spec b/php-sebastian-diff3.spec
index 3e6a84f..faad568 100644
--- a/php-sebastian-diff3.spec
+++ b/php-sebastian-diff3.spec
@@ -1,6 +1,6 @@
 # remirepo/fedora spec file for php-sebastian-diff3
 #
-# Copyright (c) 2013-2019 Remi Collet
+# Copyright (c) 2013-2021 Remi Collet
 # License: CC-BY-SA
 # http://creativecommons.org/licenses/by-sa/4.0/
 #
@@ -28,7 +28,7 @@
 
 Name:           php-%{pk_vendor}-%{pk_project}%{major}
 Version:        3.0.3
-Release:        2%{?dist}
+Release:        4%{?dist}
 Summary:        Diff implementation
 
 License:        BSD
@@ -85,13 +85,15 @@ cp -pr src %{buildroot}%{php_home}/%{ns_vendor}/%{ns_project}%{major}
 mkdir vendor
 %{_bindir}/phpab --output vendor/autoload.php tests
 cat << 'EOF' | tee -a vendor/autoload.php
-\Fedora\Autoloader\Autoload::addPsr4('Symfony\\Component\\Process', '%{php_home}/Symfony4/Component/Process');
+\Fedora\Autoloader\Dependencies::required([
+    '%{php_home}/Symfony4/Component/Process/autoload.php',
+]);
 EOF
 
 
 : Run upstream test suite
 ret=0
-for cmd in php php72 php73 php80; do
+for cmd in php php73 php74 php80; do
   if which $cmd; then
     $cmd -d auto_prepend_file=%{buildroot}%{php_home}/%{ns_vendor}/%{ns_project}%{major}/autoload.php \
       %{_bindir}/phpunit8  --verbose || ret=1
@@ -112,6 +114,9 @@ exit $ret
 
 
 %changelog
+* Mon Aug  2 2021 Remi Collet <remi@remirepo.net> - 3.0.3-4
+- fix symfony autoloader usage
+
 * Wed Jan 27 2021 Fedora Release Engineering <releng@fedoraproject.org> - 3.0.3-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild